Quote:
Originally Posted by Stephen
I don't want to start an arguement of any sort. Simply what you said earlier was rubbish..
Also they will eventually be moving all the tiers over, although 10MB will be using DOCSIS 2.0 rather than 3.
They wouldn't do that if it wasn't able to handle it!
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Sorry, you can't just say I'm talking rubbish then say that you don't want an argument and not back it up in any way.
I said that the network as rolled out cannot handle a high uptake, I didn't that this couldn't change which of course it will as time proceeds.
All modems regardless of tier are to be load balanced across the DOCSIS 3 architecture
alongside the existing VXR architecture and there will be no further VXRs added to the network. Return path bandwidth will be increased through reclaimation of upstream spectrum from VXRs to Next-Gen CMTS as load shifts, reduction in MAC domain sizes on D3 bonded groups, and introduction of DOCSIS 2 ATDMA upstream modulations and channel widths.
Right now however there is only a straight overlay, no upstream spectrum has been reclaimed, Next-Gen CMTS MAC domains are huge due to hurried deployment, and there's no ATDMA live due to STB incompatibilities meaning that upstream bandwidth is not something in plentiful supply, hence the very low upstream on the 50Mbit service at launch.
If you want an idea of how large an area the D3 bonded groups are covering think about how many downstreams you can get out of the GigE SPA capacity of a 10k and EQAMs. There are 2 10ks serving 50Mbit and 20Mbit to an area with 15 VXRs and at a guesstimate probably nearly 40,000 modems and 100,000 homes passed.
I don't want an argument either, though a debate is fine! The above are the facts as I see them, having both seen D3 overlays done on 3 other cablecos, and based on information from people who are among those doing the VM overlay.